Manganite

  
  
 
  
Origin: Ilfeld, Harz Mountains, Germany
Sample size: 11.1 x 9.5 x 7.2 cm (top/2nd row), 4 x 4.4 x 3.6 cm (3rd/bottom row)
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
Origin: Ilfeld, Nordhausen, Harz Mts., Thuringia, Germany
Ex. Gene Tribbey Collection, ex. Russ Neuwerk (Moline, Illinois) collection
Sample size: 12.5 x 7.5 x 7.5 cm
 
  
Origin: Montreal mine, Montreal, Iron County, Wisconsin, U.S.A.
Ex. Gene Tribbey Collection
Sample size: 8 x 5 x 3.3 cm
 
Manganite on barite
Origin: Negaunee, Michigan, U.S.A.
Sample size: 20 x 22 x 18 mm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

  
Origin: Ilfeld, Thuringen, Germany, Europe
Ex. Frank Edwards collection
Sample size: 5 x 4.2 x 3.7 cm
 

Photo courtesy of: 

John Veevaert, Trinity Mineral Co

Trinityminerals.com

 

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